Nitrogen oxides(NOx=NO+NO2)are important precursors of ozone(O3),and NOx and its oxides together constitute reactive nitrogen oxides(NOy)in the atmosphere.A comprehensive understanding of the total NOy level in the atmosphere is of great significance for a deeper understanding of the atmospheric nitrogen cycle and oxidation,as well as for formulating strategies for air pollution prevention and control.In this work,a thermal decomposition-broadband cavity enhanced absorption spectroscopy(TD-BBCEAS)technique for online measurement of total NOy in the atmosphere was developed.With this method,the NOy was efficiently converted into NO2,and the total NOy concentration in the atmosphere was indirectly obtained by measuring NO2.Focusing on the key factors affecting the measurement of total NOy,the influence of NO titration efficiency and other NOy component TD efficiency on measurement accuracy was emphasized.By changing the oxygen(O2)flow rate through the mercury lamp to alter the O3 concentration for titrating NO,the conversion efficiency of NO was evaluated.At O2 flow rate of 6 mL/min,the conversion efficiency of NO was greater than 99%.TD efficiency testing and analysis on NO2,peroxyacetyl nitrate(PAN),nitric acid(HNO3),and nitrous acid(HONO),which account for a large proportion of atmospheric NOy components,was carried out using 680℃as the optimal TD temperature for efficient conversion of NOy.With NO and HONO sample gases as typical verification gases,the conversion efficiency of NOy and the accuracy of NOy measurement by TD-BBCEAS system were verified by switching the on and off modes of mercury lamp and TD device.At integration time of 60 s,the detection limit of the system for NOy was 2.83×1010 molecules/cm3(60 s,2σ).A comparative measurement of actual atmospheric NOy was conducted between the TD-BBCEAS system and the NOy analyzer.The observation results showed a correlation coefficient(R2)of 0.98 and a slope of 0.93,further verifying the feasibility and accuracy of applying the TD-BBCEAS system to measurement of total NOy.

Objective:To re-evaluate the intervention effect of Kuijietong（KJT） on ulcerative colitis（UC）. Method:Sixty patients with mild-to-moderate UC in the active stage were enrolled and randomized into a KJT group （n=30） and a sulfasalazine （SASP） group （n=30）. Patients in the KJT group were treated with KJT granules， one bag divided in two daily doses， once in the morning and once in the evening， while those in the SASP group received SASP， 1 g per time， four times per day. Then the clinical efficacy was evaluated. Result:According to the modified Mayo score，the clinical remission rates of the KJT group and SASP group were determined to be 46.7% （14/30）and 40% （12/30），exhibiting no significant difference between the two groups （P>0.05）. The clinical effective rate of the KJT group was 83.3% （25/30），which was better than 60% （18/30） of the SASP group （P<0.05）. The mucosal healing rate in the KJT group was 36.7% （11/30）， not significantly different from 30% （9/30） in the SASP group. In the alleviation of UC symptoms，the score of large intestine dampness heat syndrome in the KJT group was remarkably better than that in the SASP group （P<0.05），but there was no significant difference in inflammatory bowel disease questionnaire （IBDQ） score between the two groups. In terms of physical and chemical indexes，serum erythrocyte sedimentation rate （ESR） in the KJT group after intervention was lower than that in the SASP group （P<0.05），whereas the interleukin-10 （IL-10） level was higher（P<0.05）. The comparison between the two groups revealed no significant difference in C-reactive protein （CRP）， tumor necrosis factor-α （TNF-α）， CD4⁺ T cells and regulatory T （Treg） cells after intervention. During the intervention，no obvious adverse reactions were found in the two groups，indicating good safety. Conclusion:KJT is not inferior to SASP in relieving mild-to-moderate UC in the active stage.

Huang-Qin Decoction (HQD) is a classic prescription for diarrhea in Chinese medicine treatment. Recent studies have demonstrated that HQD and its modified formulation PHY906 could ameliorate irinotecan (CPT-11) induced gastrointestinal (GI) toxicity and enhance its anticancer therapeutic efficacy. Nevertheless, which constituents in HQD are effective is still unclear so far. The study aims to screen out the key bioactive components combination from HQD that could enhance the anticancer effect of CPT-11. First, the potential bioactive constituents were obtained through system pharmacology strategy. Then the bioactivity of each constituent was investigated synthetically from the aspects of NCM460 cell migration, TNF-α release of THP-1-derived macrophage and MTT assay in HCT116 cell. The contribution of each constituent in HQD was evaluated using the bioactive index E

Objective On the basis of previous research, we intended to further explore whether Kuijietong chieving the inhibitory effect on inflammatory action in ulcerative colitis(UC) through inhibiting the phosphorylation of IkappaBalpha/NF-kappaB p65(p-IκBα/NF-κB p65). Methods UC rat model was established by free drinking of dextran sulfate sodium(DSS) water. SD rats were randomly divided into normal group, model group, high-dose Kuijietong group(at intragastric dosage of 15 g·kg-1·d-1), low-dose Kuijietong group(at intragastric dosage of 5 g·kg-1·d-1), SASP group (at intragastric dosage of 0.3 g·kg-1·d-1). After treatment for 2 weeks, the expression levels of p-IκBα/IκBα and p-NF-κB p65/NF-κB p65 in colon tissues were determined by Western blotting method. Results The expression levels of p-IκBα/IκBα and p-NF-κB p65/NF-κB p65 in high-dose Kuijietong group were decreased significantly as compared with those in the model group and western medicine group, the difference being statistically significant(P<0.001). Conclusion Kuijietong has protective effects against inflammation in UC through blocking the activation of NF-κB classic inflammatory pathway, and the effect of high dosage of Kuijietong is the strongest.

Traditional Chinese medicine (TCM) is a unique health resource in China and one of the main representative traditional medicines globally. TCM has formed a new way of looking at medical practices, health care, scientific research, education, industry and culture. It focuses on promoting and safeguarding the health of people, with an increasing contribution to economic and social development. Establishing a comprehensive evaluation system in accordance with the characteristics of TCM services could promote the scientific merit and the standardization of services management. This would improve health service quality and the social and economic benefits of TCM. It would broaden the field of TCM services research. It would also provide the basis for the formulation of relevant government policies. This study estimates the prospect of establishing a comprehensive evaluation system of TCM services.

OBJECTIVETo investigate the effects of platelet-rich plasma (PRP) on the proliferation of dermal papilla cells (DPCs) and hair follicle regeneration.

METHODSPRP was prepared using the double-spin method and applied to DPCs. The proliferative effect of activated PRP on DPCs was measured using MTT assay. To understand the influence of activated PRP on the hair-inductive capacity of DPCs, freshly isolated epidermal cells and DPCs of passage 4 were resuspended, mixed with various concentrations of a PRP (0%, 5% or 10%) and were then transferred to a grafting chamber, which was implanted onto the dorsal skin of nude mice. The chambers were removed 1 week after grafting and HF formation was monitored for 4 weeks; the graft site was harvested and processed for histological examination.

RESULTSActivated PRP increased the proliferation benefited the aggregative growth of DPCs. There are significant difference in the yield of hair follicles compared with 10% PRP (344 +/- 27) with 0% PRP (288 +/- 35) in the area of reconstituted skin (P < 0.05). The areas treated with PRP demonstrated an increase in hair follicles density of 19.4%. Ten percent PRP (18 +/- 1) d also can significantly shorten the time of hair formation, compared with 0% PRP (20 +/- 1) d (P < 0.05).

CONCLUSIONSThere is a considerable effect of PRP on the time of hair formation and the yield of hair follicles reconstitution.

Animals ; Cell Proliferation ; Cells, Cultured ; Female ; Hair Follicle ; cytology ; growth & development ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Nude ; Platelet-Rich Plasma ; Regeneration ; Skin ; cytology ; Skin, Artificial